Abstract
We investigate pseudogap phenomena in the unitarity limit of a trapped superfluid Fermi gas. Including effect of strong pairing fluctuations within a T-matrix approximation, as well as effects of a harmonic trap within the local density approximation (LDA), we calculate the local superfluid density of states below the superfluid phase transition temperature Tc. We show that the spatial region where single-particle excitations are dominated by the pseudogap may still exist even below Tc, due to inhomogeneous pairing fluctuations caused by the trap potential. From the temperature dependence of the pseudogapped density of states, we identify the pseudogap regime of the unitarity Fermi gas with respect to the temperature and spatial position. We also show that the combined T-matrix theory with the LDA can quantitatively explain the local pressure which was recently observed in the unitarity limit of a 6Li Fermi gas.
| Original language | English |
|---|---|
| Article number | 012080 |
| Journal | Journal of Physics: Conference Series |
| Volume | 400 |
| Issue number | PART 1 |
| DOIs | |
| Publication status | Published - 2012 |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Inhomogeneous pseudogap phenomenon in the BCS-BEC crossover regime of a trapped superfluid Fermi gas. / Watanabe, Ryota; Tsuchiya, Shunji; Ohashi, Yoji.
In: Journal of Physics: Conference Series, Vol. 400, No. PART 1, 012080, 2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Inhomogeneous pseudogap phenomenon in the BCS-BEC crossover regime of a trapped superfluid Fermi gas
AU - Watanabe, Ryota
AU - Tsuchiya, Shunji
AU - Ohashi, Yoji
PY - 2012
Y1 - 2012
N2 - We investigate pseudogap phenomena in the unitarity limit of a trapped superfluid Fermi gas. Including effect of strong pairing fluctuations within a T-matrix approximation, as well as effects of a harmonic trap within the local density approximation (LDA), we calculate the local superfluid density of states below the superfluid phase transition temperature Tc. We show that the spatial region where single-particle excitations are dominated by the pseudogap may still exist even below Tc, due to inhomogeneous pairing fluctuations caused by the trap potential. From the temperature dependence of the pseudogapped density of states, we identify the pseudogap regime of the unitarity Fermi gas with respect to the temperature and spatial position. We also show that the combined T-matrix theory with the LDA can quantitatively explain the local pressure which was recently observed in the unitarity limit of a 6Li Fermi gas.
AB - We investigate pseudogap phenomena in the unitarity limit of a trapped superfluid Fermi gas. Including effect of strong pairing fluctuations within a T-matrix approximation, as well as effects of a harmonic trap within the local density approximation (LDA), we calculate the local superfluid density of states below the superfluid phase transition temperature Tc. We show that the spatial region where single-particle excitations are dominated by the pseudogap may still exist even below Tc, due to inhomogeneous pairing fluctuations caused by the trap potential. From the temperature dependence of the pseudogapped density of states, we identify the pseudogap regime of the unitarity Fermi gas with respect to the temperature and spatial position. We also show that the combined T-matrix theory with the LDA can quantitatively explain the local pressure which was recently observed in the unitarity limit of a 6Li Fermi gas.
UR - http://www.scopus.com/inward/record.url?scp=84873695689&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84873695689&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/400/1/012080
DO - 10.1088/1742-6596/400/1/012080
M3 - Article
AN - SCOPUS:84873695689
VL - 400
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - PART 1
M1 - 012080
ER -